morse



T. B. MORSE, 0F" NEW.HAVEMLGONNEOTIGUT.

Letters Patent No. 79,494, dated June 30, 1868.

IMPROVEMENT IN cARRIAcesHAcK E.

on some ttitmll it in ihtflt Eaters fittest tut mating met at the same.

TO A L WHOM IT MAY CONCERN:

Be it knowu tha t I, T. B. MORSE, of New-Haven, in the county of New Haven,and State of Connecticut, have invented a new Improvement in Cari-iagesshackles and I do hereby declare the followingflvhen taken in connection with the accompanying drawings, and the letters-of reference marked thereon, to bee. full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-- Figure 1, a side view, Figure 2 a top view, Figure 3 a section on line a: m, Figure 4 a perspective view of the block, detached, Figure 5 a vertical central section, and in. Figure 6 the blank as heretofore used, introduced for the purpose of illustrating this improvement. 7 This invention relates to'anQ improvement in.what are'known to the trade as carriage-shackles, that is, the coupling or z tttachrnent for, securing the shafts or pole to the axle of a carriage, the object being to construct the shackle so that a larger rubberpaicking may be inserted and secured than has heretofore been done, and without extra expense in construction.

The rubber packing heretofore used, and known as the Chapman patent, is illustrated in fig. 6, A being the packing,'B the thill-iron, and C the bolt. This packing-has necessarily been thin back of the thill-iron head, as the blocks are constructed tobe applied to shackles of common construction. The action of the rais; ing and lowering of the thil'l-irou is illustrated in fig. When the thill-ironfis turned up, as denoted in the drawing, the rubber rolls down from the centre, as denoted in the drawing; On doubling the shaftto the position in red, the packing rolls up, as denoted in red, thus keeping a continual strain up and down upon the pack ing in the centre, which soon cracks and destroysthe packing, so that it inust be replaced by a new piece, the piece itself being simply a square block, made concave on one side,'to fit the thill-ir'on head. Y

My invention, whereby this difiiculty is. overcome, consists in constructing the shackle with a deeper recess back of the. thill-iron head, by forming a cavity in each internal-angle of the shackle, the two edges of the shacklebeing supported by a web left in tho shackle at the angles; also,=in the construction otla block or packing, to correspond to the shackle so constructed. Q a a I In orderto the clear understanding of my invention, I will fijilly describc the same as illustrated in the accompanying drawings. a

D D are the two ears of the shackle, formed upon the clip E in the usual manner Fis the'tliill-iron, fitte'd into the sliackle in the usual manner, and secured by the bolt G.

The space back of the thi ll-iro'u head I cut away, so as to forma'r'ecess in each internal angle of the shackle, as denoted at a by the brokenlin'os, figs. 2 and 3, leaving at the out'e'nsurface, above and below, in each ofthe said angles,'-a web for the support of the cars, as seen in fig, 2. This cavity may be formed by the process of forging, or may be cut out, I I v v The block 11 is formed to correspondtto the said recesses a, and, as clearly seen in fig. 4, the outer surfaces of the block corresponding in form to the edge of the web or braces in the angle of the shackle, and up'on the rear of the block, at'each corner, is formed a projection, corresponding to and so as to nearly or, quite fill the said recesses a. The surface of the block next the thill-iron is made concave, to oorrespond to the head on the thill-iron. By this it will be seen that,'as in vertical central section of' the block, as in fig. 5, or a longh tudinal soction,'as in fig. 3, theblock for a shackle o'fthcsame size as hcretofore'constructed is nearly or quite; doubled in thickness, therefore affording so much larger quantity of rubber at the centre, that the (lifliculty' of cracking heretofore experienced in Chapmansrubber iseutirely overcome. Theez'rtra thickness giving a greater amount of elasticity, the India-rubber block practically will last as long as the shackle itself.

The web in the angles also serves to hold theblock in its place, so that it" is not liable to drop out when the shafts are removed. c a

Having thus fully described my invention, what I claim as new and useful, and'desire to secure by Letters Patent, is'- 1. A shackle, constructed with the recesses a in each of the internal angles, so as to receive the block H, substantially as and for the purpose specified. I

2. The block H, formed from India rubber, and with projections 01 upon each angle, corresponding to the recesses a a in the shackle, substantiallyns and for the purpose specified.

' T. B. MORSE.

Witnesses:

JLH. SHUMWAY, A. J. Tnznns. 

